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(No Model.) 2 Sheets-Sheet 1.

9. B. G-URY..

VISE'.

Patented June 13,1893.

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J. B. GURY. Y

VISB.

Patsnted June 13,1893.

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JOHN B. GURY, or sr. Louis, MISSOURI.

VISE.

SPECIFLCATION forming part of Letters Patent No. 499,291, dated .Tune 13, 1893.

Application filed January 25, 1893. Serial No. 459,677. (No model.)

To all whom it may concern:

Be it known that I, JOHN B. GURY, of St.

Louis, Missouri, have made a new and useful Improvement in Vises, of which the following is a full, clear, and exact description.

The present improvement is adaptable to various forms of bench and other vises, and especially to vises used in connection with milling and planing machines, andit consists mainly in the means whereby the movable jaw is adapted to be readily and rapidly operated, and to be Opened widely, and when closed to be easily and securely tightened upon the object to be clamped, all substantially as is hereinafter set forth and claimed, aided by the annexed drawings, making part of this specification, in whichI Figure 1 is a view in perspective of theimproved vise; Fig. 2 a plan of the same; Fig; 3 a vertical, longitudinal, central section of the same; Fig. 4 a bottom View; Fig. 5 avertical cross section on the line 5-5-of Fig. 3; Fig. 6 a view in perspective of the movable jaw; Fig. 7 a View in perspective of the fixed jaw; and Fig. 8 a side elevation of the screw. The same letters of reference denote the same parts. v

A represents the fixed jaw of the construction. It is attached to the bed-plate, B, and in practice it can be made in one piece therewith, substantially as shown. The jaw may have a suitable face-placaa, which is held in place by means of the bolts a', and a2 o2 represent strengthening ribs, and a3, a3, are perforated lugs to provide for attaching the vise to any suitable support.

C represents the movable jaw. It is adapted to be moved upon the bed-plate toward and from the fixed jaw, as indicated by its positions shown in the full and in thebroken lines, respectively, in Fig. 3. It is Operated by means of the screw D, and in its movement it is guided by means of the bar or plate E. The last named part extends longitudinally upon the bed-plate, and preferably from end to end thereof, and is suitably secured thereto, and, to fully carry out the improvement, it is swiveled to the bed-plate to be turned laterally thereon,- as indicated by its different positions shown in broken lines in Fig'. 2, and its end, e, works in a socket, o4, in the fixed jaw, and at its Opposite end the part is provided with a threaded bearing, e', to receive the screw, D, which in operating the movable jaw is worked forward and back therein in the manner presently described. 1

F represents the bearing upon which the guide-bar E is swiveled. Its preferable form is shown as beingaboltinserted from beneath in the bed-plate and extending upward into 6o the guide bar, and having` its upper end, f, threaded to be screwed into the guide bar. The guide-bar carries the movable jaw and the screw D with it in its lateral adjustment, and it can be fastened as desired so as to cause the movable jaw to be presented at the preferred angle to the fixed jaw by means of the tightening bolt G which works through the slot, b, in the bed-plate and is threaded at g, to be screwed into the guide-bar, substantially as shown. The guide-bar is preferably of the dove-tail form shown in cross section and the movable jaw is correspondingly shaped in its vunder side to engage therewith, and the movable jaw may have a suitable wear-plate, c, which takes the lateral wear upon'the jaw. The movable jaw also may have a face-plate, c', which is held in place by the bolts c2, as shown. The leading feature, however, of the improvement is' the, means for opening and closing the movable jaw. The screw D, is double-threaded, having a right hand threaded portion, d, which. engages in the'bearing e', and a left hand threaded portion, cl', which engages, at c3, with the movable jaw. The rotation of the screw, D, therefore causes the screw to be moved endwise in thebearing e', and the movable jaw to be moved endwise upon the screw. The result is the jaw is rapidly Opened apart from and closed toward the fixed jaw. The

movable jaw can also be opened widely,.as

indicated in Fig. 3. To provide for this the jaw may be' recessed as shown at c4, or otherwise shaped, to pass the bearing, e. The movable jaw is alsoV suitablyshaped to admit the screwand the chamber, c5, into which the end of the screw, in the present instance, passes, may be enlarged in Order to lighten the jaw.

An additional feature of the improvement is' making the thread in the portion d finer than is the thread in the portion d of the screw D. By this means, after the movable jaw is about to be closed, by a slight turn of the screw the jaw can be made to securely clamp the object being held in the vise. The screw D, is provided with a suitable crank, d2, to enable it to be readily turned. In this manner it will be seen that the movement of the movable jaw is greatly facilitated, the capacity of the vise is increased, and the work is securely held, and at the same time the vise is adapted for holding irregular or tapered objects as well as dat ones of uniform diameter or cross section.

I claim- 1. The combination of the'bed plate having at its end the fixed jaw, and perforated to admit a set screw to swivel the guide bar of the movable jaw, and slotted to admit a screw on which the guide is laterally movable, and the movable jaw and the double threaded screw operating the same, and the threaded bearings for the screw to be moved in.

2. In combination with the bedv plate having at its end the xed jaw recessed for the end of the guide bar, to allow its movements r on its swiveled and slotted connections with the bed plate, the movable jaw and its do1ble threaded screw operating in bearings in the `movable jaw, and in the outer end of the for the guide plate, and the screw for operating the movable jaw substantially as set forth.

4.- In combination with the bed plate and the fixed jaw, the guide bar secured thereto, as described, and having at its outer end the bearing e', and dovetail in form, and the movable jaw having a dovetail recess by which it fits to and moves onl said guide bar, and a re- -vcess o, to fit upon and over the bearing e', gwhen the movable jaw is full-y d-rawn back, :substantially as described.

Witness my hand this 7th day of January,

JOI-IN B. GURY.

Witnesses:

C. D. MOODY, A. BoNvILLE. 

